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Honors Biology Chapter 7Section 3 Cell Boundaries
surround all cells is a thin, flexible barrier that acts like the cell’s “gate keeper” made of lipid-bilayer provides protection & support
Fluid Mosaic Model phospholipids
resembles an ever-moving sea of fluid lipids that has large proteins bobbing along throughout the lipids
1. Phospholipids (~70% of membrane) 2. Cholesterol: changes fluidity of membrane 3. Glycolipids sugar molecule on lipid
Integral Proteins go all the way thru the membrane channel proteins receptor proteins Peripheral Proteins on inside or outside of membrane +/- attached to integral proteins
found in: plant cells fungi cells algae bacteria secreted by cell membrane allow O 2, CO 2, glucose, & H 2 O to pass through
3.3 Cell Membrane KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.
Plasma Membrane. Function Allows nutrients to pass into and out of the cell. Allows nutrients to pass into and out of the cell. Maintains homeostasis.
Chapter 5 Membrane Structure and Function part I Page ref
Plasma Membrane Outer boundary of a cell Gatekeeper - controls what enters and leaves the cell.
Aim: How cell membrane organized? HW #10 1. Complete the handout on the cell Do now: You have 5 min. 1.Explain how the following structures: a.Nucleolus.
Cell Boundaries All cells are surrounded by a thin, flexible barrier known as the cell membrane. Many cells also produce a strong supporting layer around.
Cell Membranes Separates the Inside of the cell from the outside of the cell.
End Show Slide 1 of 47 Copyright Pearson Prentice Hall Biology.
Click on a lesson name to select. Chapter 7 Cellular Structure and Function Section 1: Cell Discovery and Theory Section 2: The Plasma Membrane Section.
Section 3-3, 3-4, 3-5 Movement across the c ell membrane Write everything that is underlined.
Target VII Identify and describe the functions of the component structures of the plasma membrane: phospholipid, integral protein, peripheral protein,
Chapter 5 A Closer Look At Plasma Membranes Chapter 5 A Closer Look At Plasma Membranes Honors Biology.
Chapter 7 Membrane Structure and Function Days8 Objectives -You will understand that membranes are fluid -The structure results in a semi-permeable membrane.
Biology AHSGE Standard IV- Cell Organelles. Biology AHSGE Biology Standard 4. Describe similarities and differences of cell organelles, using diagrams.
CELL MEMBRANE CELL MEMBRANE - is a 2-dimensional fluid mosaic of lipids and proteins and also is in constant motion. - It’s a thin, elastic structure,
AP Biology The Cell Membrane AP Biology Overview Cell membrane separates living cell from nonliving surroundings thin barrier = 8nm thick Controls.
The Cell Ch. 7. Cell History Hooke - is the scientist who 1st coined the term “cell” – in the 1660’s he observed cork from a tree stem (they reminded.
1 The Plasma Membrane The Plasma Membrane - Gateway to the Cell copyright cmassengale.
CP BIO: Ch. 7 The Cell Membrane and transport across the membrane.
How do cells maintain balance? Cells need to maintain a balance by controlling material that move in & out of the cell HOMEOSTASIS.
Chapter 7 Membrane Structure and Function. You should be able to: 1. Define the following terms: amphipathic molecules, aquaporins, diffusion 2. Explain.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece.
The cell The cell is the smallest unit of life Science and technology evolve together microscope Cell theory All living things are made up of 1 or more.
Terms Active transport Amphipathic Aquaporin Concentration gradient Co-transport Diffusion Electrochemical gradient Endocytosis Exocytosis Facilitated.
Regents Biology Cell Membranes & Movement Across Them.
CH. 7 – CELLS. I. CELLS A. What is a cell? 1. Cell – the smallest unit of matter that can carry on all the processes of life.
Unit II: The Cell All organisms are made of cells, the organisms basic unit of structure and function.
What things do organisms need to stay living?. All organisms need… Water – Most organisms are 70% water. – Gain water from fluid and food intake Air –
BIOLOGY CST Review PowerPoint Day 1: Standards. 1a -1h.
Chapter 5.2 Overview of the Membrane Proteins AP Biology Fall 2010.
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